body{
    background-color:#e5e5e5;
    margin: 0;
    /*设置 背景颜色 及其外边距*/
    height: 800px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.login{
    background-color:#ffffff ;
}

.title{
    height: 50px;
    text-align: center;
    line-height: 50px;
    border-radius: 15px 15px 0 0;
    font-size: 20px;
}
.input_div{
    margin-top: 20px;
    display: flex;
    justify-content: center;
}

.input{
    height: 30px;
    width: 80%;
    border-radius: 5px;
    border:1px solid #e5e5e5;
    padding-left: 5px;
}

.button{
    height: 40px;
    width: 83%;
    border-radius: 5px;
    margin-bottom: 20px;
    background-color: #2271b1;
    border:1px solid #2271b1;
    color: #ffffff;
}

.error{
    display: none;
    text-align: center;
    font-size: 12px;
    height: 20px;
    color: red;
}